Platen adjusting means for typewriters



Sept. 4, 1951 F. u. RITZ PLATEN ADJUSTING MEANS FOR TYPEWRITERS 5 Sheets-Sheet 1 Filed March 18, 1949 RM RN INVENTOR FRA/VC/S 0 AW Z M I ATTORNEY Sept. 4, 1951 F. u. RlTZ PLATEN ADJUSTING MEANS FOR TYPEWRITERS 3 Sheets-Sheet 2 Filed March 18, 1949 Sept. 4, 1951 F. u. RITZ PLATEN ADJUSTING MEANS FOR TYPEWRITERS 5 Sheets-Sheet 5 Filed March 18, 1949 6 ||||4Jr||J At A,

{krill/427%- INVENTOR FAA/VC/S U 4 TZ 12% ATTORNEY Patented Sept. 4, 1951 UNITED QFFlCE BLATEN ADJUSTING'IMEANSZFQRZ TYPEWRITERSJ FrancisiUL'Ritz; Ponghkeepsie';v Y3," assignor to International BusinessaMachines Corporation, New York, N; Y., a: corporationof aNew Yorkr Application-March 18, 1949;1Serial No. 82,248

( Cl. lin -149) from thetyping position commensurate with the" number-ofcopies to-bemade and the combined thickness... of the. sheets comprising the 1115.111? folding packi Qtherobjectsofthe invention. will be pointed out .in thefollowing description and. claims and illustrated in the accompanying drawings, which".

disclose by. way of 5 example, the principlejof the inventionand. the. best. mode; which; has. been contemplated, of applying. that principle.

In the. drawings:

Fig. 1 is. aaplanview partly .in1secti'on' ofjja" carriage embodying the. present. invention.

Rig, 2..is a.. vertical sectionon.the...1ine.2+2Qin.

Fig.1.

mg, 3.15. avvertlcal section .on .the..1ine..ii+-3 Fig, 1A.

The carriage: comprises. the.- leftvhand; side.

plate land the right-hand siderplate. .I I which areintegrally joinedftogethenbya channel shaped .1

member I2.. which may; be welded or .brazed' tothesideplates wand; II.

stoprod I4, and by the. tabulating stoprod. I4a. Pivotally mounted. between therplates'. I 9 and... I I

arethe paper bail arms.- I5..supporting,, the cross.

shaft. I 5a. on. which are. rotatably. and longitu:

dinallyadjustably mounted the paper-bail rollers l6; Thechannel shaped member I2 acts as a guide for the usual anti-friction rollers I7 by means of which the carriage. is mountedon the guide. rails I8. (Fig. 2)

Slidably mounted on the plates Itand'fil is" apair. of plates I9 each havinginclinedparallel slots.v lea guided by circumferential grooves in the. studs 2!! carriedby; the. plates It; and" !I.

The; lowest two' slots: lf'a, are openwhile the others are key hole shaped topermit removal of the plates the plates 'l9to be removed from the studSZfl.

Theplates: are. also. joined togoth-er by. a tie rod; I3, the. marginal I9 when necessary bysliding theplates toward the front of'the-machine-until the larger portions .of .'the:studs .2 G'enter the. enlarged porti'onsjof' the key hole slots thus permitting;

2 Thereisone open slot 19a and two keyhole? shaped'slots lila foreachplate I9. These plates-'- removably-rotatably-support the platen 2| and have-= associated therewith means for "adjustably slidingtheplates on the studs-'20 to move the platen-'towardand' away-from the printingjpoint- Th'e'-platen may boot "the usual construction-- andiincludes' the usual platen rotating'knobs 21a andthe line spacingratchetZ-I b. The platen may be provided with line spacing mechanism of the-"type disclosed"iniPatent- 1951322.

- Theplaten is'removablymounted in-thc plates; I 9: by; means of" open. slots" lQb which act as cradles ffOr the: platenshaft "and. is" retained in these-slots by means. oftheplaten latches 22 jPlvoted at sea, Ila (Figs. amid-e) are the usual, carriagetrelease.levers.2t which'have finger. piecesfisa. by means of whichthe levers '2 i..may befrock'edplockwise (F.iggz') to actuate the usuali relasefbail'lzaina counterclockwise direction in awelllknown way. Journalledjn the plates. IEI

and II is'theshaft 26.'to.;which is'secured'the. arm 21. The shaftzfi supports theusualpaper. deflectorv which is. provided. with. pressure. rollersj coacting with, the. platen to. press. paperswrapped 1' around; the platen. against the. platen. This paper deflector.isnotshown in the present. instance... as itgforms. .nopart of the present. in-:. vention andjit's. showingrintheedrawings would beconfusing.

Thashaft 2.6 may. be. =rocked counterclockwise (Fig .2) to. release :the. paper; deflector. by means? of.. the. .lever. 2.8 --.whichis.- pivotally connected at 29a to an arm 29 and at 21a to the arm 21. 29 is pivoted at Ifia to plate Hi1. When the lever 284s drawn to thetrightmanually (Fig; 2), the

pivot 29a? swin s to; the. right and the-lever 28.

swings:clockwiseathereby depressing the arm 21 against the 1 tension of;:.the- 11115115.]. 1 spring" actuateing-the paperi'deflector:

Mounted on the plates =I0 fandf l I arer-the2-platesa 80, each of which is bifurcated to slide on a shouldered stud lob, lib carried by the plates H], H while the other end of each plate has a round hole by means of which the plates 33 are pivoted on eccentric shoulders in studs 3! carried by the associated plate H) or I l. Journalled in the plates 30 is the shaft 32 formed with two eccentric cams 32a smoothly fitting open vertical slots in the plates I 9. It is evident that rotation of the shaft 32 will result in the plates l9 sliding on the pins 20. The plates 3!] and the shouldered studs 3! are provided for the purpose of initially adjusting the platen for parallelism after which the studs 3| are secured by means of clamping screws 33 to retain the adjustment.

Secured to the shaft 32 at the right-hand end of the carriage (Fig. 1) is the lever 34. This lever has a pin 3% or bump formed therein capable of registering with any one of a series of holes.35a in an arcuate index plate 35 mounted on the plate H by screws I lb and 33 and having the stop lugs 35b for limiting the extent of rotation of lever 34 in either direction. The pin or bump 34a may be sprung out of the holes 35a and shifted into register with another hole. With the lever 35 in the position of Fig. 3, the eccentrics 32a hold the plates 19 in their most forwardly position or left-hand position relative to the type guide in which the distance of the platen from the type guide is at a minimum. When the lever 34 is rotated clockwise (Fig. 3) to the opposite extreme the plates l9 will be drawn to the right or rearwardly of the type guide and shift the platen an extent determined by how far the lever 34 is moved.

For a single sheet or perhaps a single carbon copy, the lever will be set in the position shown in Fig. 3 or with the pin 34a in the next adjacent hole 35a on the right. In the case of a very thick manifolding pack, the lever 34 will be shifted to one of the extreme right-hand holes (Fig. 3) thereby moving the platen an extent commensurate with the thickness of the manifolding pack.

Secured to the plates 18 and II are the half housings 36 to which are pivoted, at 36a, the half housings 3?, the housings 35, 31 forming enclosures at each end of the carriage for the various levers and other parts associated with the ends of the carriage. provided with suitable slots and openings for the carriage release levers 24, the paper deflector release lever 28, and the lever 36 for adjusting the platen to the thickness of the manifolding pack. There is also provided a line spacing control lever 33 and the left-hand housing 3! is provided with slots to accommodate this lever. This line space lever functions the same as in Patent 1,957,322.

'While there have been shown and described and pointed out the fundamental novel features of the invention as appl ed to a preferred embodiment, it will be understood that various omissions and substitutions and changes in the form and details of the device illustrated and in its operation may be made by those skilled in the art without departing from the spirit of the invention. It is the intention, therefore, to be limited only as indicated by the scope of the following claims.

What is claimed is:

1. In combination, a carria e having a pair of parallel side plates. mounting studs on said plates, a pair of platen supporting plates each mounted on said studs for sliding movement parallel with said side plates at right angles to the movement of the carriage; a shaft rotatably mounted insaid The housings 31 are side plates and having a pair of cams, each cam being received in a slot formed in one of the supporting plates whereby rotation of the shaft effects the aforesaid movement of said plates, a manual setting lever secured to said shaft, and an indexing plate mounted on said carriage and coacting with said lever to releasably retain said lever in its set positions.

2. In combination, a carriage having a pair of parallel side plates, mounting studs on said plates, a platen, a pair of platen supporting plates each mounted on said studs for sliding movement parallel with said side plates at right angles to the movement of the carriage; a shaft having a pair of cams, each cam being received in a slot formed in one of the supporting plates whereby rotation of the shaft effects the aforesaid movements of said plates, means to mount said shaft in said side plates for adjusting said platen into parallelism with the movement of the carriage, a manual setting lever secured to said shaft, and an indexing plate adjustably secured to said carriage and coacting with said lever to releasably retain said lever in its set positions.

3. In combination, a carriage having a pair of parallel side plates, mounting studs on said plates, a platen, a pair of platen supporting plates each mounted on said studs for sliding movement parallel with said side plates at right angles to the movement of the carriage; a shaft having a pair of cams, each cam being received in a slot formed in one of the supporting plates whereby rotation of the shaft effects the aforesaid movement of.

said plates, means to mount said shaft in said side plates for adjusting said platen into parallelism with the movement of the carriage, a manual setting lever secured to said shaft, and an indexing plate adjustably secured to said carriage and coacting with said lever to releasably retain said lever in its set position, said shaft mounting means including a pair of bearing plates slidably mounted on said side plates and eccentric studs, one for each side plate, carried by said side plates, and pivotally supporting said bearing plates for adjustably, shifting said bearing plates.

4. In combination with the carriage of a typewriting machine, a platen, a pair of platen supporting plates mounted in said carriage for limited movement at right angles to the movement the movement of the carriage, a shaft extending parallel with the axis of the platen and having cams received in suitable bearings in said plates, bearing plates for supporting said shaft in said carriage and individually adjustably movable to, shift the axis of the shaft sufficiently to place the axis of the platen parallel with the movement of the carriage, means to secure said bearing plates in adjusted positions, and indexing means for said shaft including a manual lever having a connection to said shaft for adjustably rotating said shaft.

5. A carriage for typewriters and other ofiice machines comprising a main member, three pairs of plates, one plate of each pair being located at the ends of the main member, one pair of plates being secured to the ends of said member and movably supporting the other two pairs for movement in unison at right angles to the carriage movement, a platen rotatably mounted in one of said movable pairs, means mounted on the other of said movable pairs for adjustably moving said one movable pair at right angles to the carriage movement, and means for adjustably moving said other movable pair relative to the fixed pair.

6. A carriage for typewriters and other ofiice machines comprising a main member, three pairs of support members, one member of each pair being located at the ends of the main member, one pair of support members being secured to the ends of said member and movably supporting the other two pairs for movement in unison at right angles to the carriage movement, a platen rotatably mounted in one of said movable pairs, means mounted on the other of said movable pairs for adjustably moving said one movable pair at right angles to the carriage movement, and means for 6 adjustably moving said other movable pair relative to the fixed pair.

FRANCIS U. RITZ.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS 10 Number Name Date 1,082,536 Lorenz Dec. 30, 1913 1,164,945 Lorenz Dec. 21, 1915 7 1,175,886 McLaughlin Mar. 14, 1916 

